For those who are curious, you can look at the replays below. Admittedly I played some of these while very sleepy so there might be some turns where the play is a bit erratic/doesn't make sense, but whatever.

Wow, that's awesome!
I didn't think it was possible either. Looking back at my own UtBS playthrough, turns out I had gotten 33 poor elves needlessly slaughtered.

That Battle of Zocthanol Isle replay was just amazing! I had a lot of trouble with that scenario with high level enemies everywhere, all the poison and all the stupid bats spawning right on top of you, but you just tore right through them all!

I thought that the Battle of Zocthanol was actually pretty easy; the one I usually have the most trouble on is Stirring in the Night, since I usually try to not lose any villages (or maybe just 1, coz I'm greedy ). The other tricky one is A Subterranean Struggle, mostly since the elves have terrible defense on cave. I'm ashamed to say that I failed the no loss play the first time I played on it and had to reload the scenario.